Meet Harriet White, Sherlock Holmes' feisty – and entirely fake – assistant, in this gloriously new take on one of Sherlock's most famous cases, perfect for fans of Anita Prose, Verity Bright and Janice Hallett.

'When did you become aware something was wrong?’

‘...When the screaming began…’

Harriet White is no stranger to odd correspondence. Ensconced in the basement of the Baker Street building society, her job is to reply to the mail they receive on behalf of Sherlock Holmes.

But while letters to the fictional sleuth may be plentiful, telegrams are rare, and so when she receives one describing the grave situation of celebrated author Philip St John, her interest is piqued. The writer describes St John as being consumed by terror, seeing ghostly apparitions on the fens, and only at ease in the company of his loyal wolfhound.

Before long, Harry finds herself in Cambridgeshire under the guise of being Holmes’ assistant. The residents of Thurmwell Manor believe their master is cursed. Harry is sure there must be a logical explanation, but inside the echoey halls of the grand gothic house, her confidence in science and reason begin to crumble…

Can Harry solve the mystery before the fens claim their next victim?

Join Harriet White in 1930's London for another glorious Sherlock Holmes-inspired mystery, for fans of Nita Prose and Janice Hallett.